Did a couple of minor updates on this client's vehicle. We were a few HP shy of the 700 mark last time in the bad heat. Was able to re-dyno the car, still at 12* timing, made 13psi, on a decent weather day.

Any benefits of removing restrictor and swapping pulley vs just grinding restrictor?

Yes very negative.. You'll see the loss in torque from going up on the pulley and removing the restrictor. That's why the ECS restrictor design has worked so well since its inception a long time ago, bringing on that torque down-low on centri-systems.

Yes very negative.. You'll see the loss in torque from going up on the pulley and removing the restrictor. That's why the ECS restrictor design has worked so well since its inception a long time ago, bringing on that torque down-low on centri-systems.